Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 | 44 | #include <linux/nfs_fs.h> |
5043e900 TM |
45 | #include <linux/kthread.h> |
46 | #include <linux/module.h> | |
9f958ab8 | 47 | #include <linux/random.h> |
8c7597f6 | 48 | #include <linux/ratelimit.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
0aaaf5c4 | 51 | #include <linux/jiffies.h> |
1da177e4 | 52 | |
05f4c350 CL |
53 | #include <linux/sunrpc/clnt.h> |
54 | ||
4ce79717 | 55 | #include "nfs4_fs.h" |
1da177e4 LT |
56 | #include "callback.h" |
57 | #include "delegation.h" | |
24c8dbbb | 58 | #include "internal.h" |
40c64c26 | 59 | #include "nfs4idmap.h" |
76e697ba | 60 | #include "nfs4session.h" |
974cec8c | 61 | #include "pnfs.h" |
bbe0a3aa | 62 | #include "netns.h" |
1da177e4 | 63 | |
e3c0fb7e CL |
64 | #define NFSDBG_FACILITY NFSDBG_STATE |
65 | ||
1da177e4 LT |
66 | #define OPENOWNER_POOL_SIZE 8 |
67 | ||
93b717fd | 68 | const nfs4_stateid zero_stateid = { |
e0714ec4 | 69 | { .data = { 0 } }, |
93b717fd TM |
70 | .type = NFS4_SPECIAL_STATEID_TYPE, |
71 | }; | |
05f4c350 | 72 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 73 | |
591d71cb | 74 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 75 | { |
fd954ae1 TM |
76 | struct nfs4_setclientid_res clid = { |
77 | .clientid = clp->cl_clientid, | |
78 | .confirm = clp->cl_confirm, | |
79 | }; | |
f738f517 CL |
80 | unsigned short port; |
81 | int status; | |
bbe0a3aa | 82 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 83 | |
fd954ae1 TM |
84 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
85 | goto do_confirm; | |
bbe0a3aa | 86 | port = nn->nfs_callback_tcpport; |
f738f517 | 87 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 88 | port = nn->nfs_callback_tcpport6; |
f738f517 | 89 | |
bb8b27e5 TM |
90 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
91 | if (status != 0) | |
92 | goto out; | |
fd954ae1 TM |
93 | clp->cl_clientid = clid.clientid; |
94 | clp->cl_confirm = clid.confirm; | |
95 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
96 | do_confirm: | |
bb8b27e5 TM |
97 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
98 | if (status != 0) | |
99 | goto out; | |
fd954ae1 | 100 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
101 | nfs4_schedule_state_renewal(clp); |
102 | out: | |
1da177e4 LT |
103 | return status; |
104 | } | |
105 | ||
05f4c350 CL |
106 | /** |
107 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
108 | * | |
109 | * @clp: nfs_client under test | |
110 | * @result: OUT: found nfs_client, or clp | |
111 | * @cred: credential to use for trunking test | |
112 | * | |
113 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
114 | * If zero is returned, an nfs_client pointer is planted in | |
115 | * "result". | |
116 | * | |
117 | * Note: The returned client may not yet be marked ready. | |
118 | */ | |
119 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
120 | struct nfs_client **result, | |
121 | struct rpc_cred *cred) | |
122 | { | |
123 | struct nfs4_setclientid_res clid = { | |
124 | .clientid = clp->cl_clientid, | |
125 | .confirm = clp->cl_confirm, | |
126 | }; | |
9f62387d | 127 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
128 | unsigned short port; |
129 | int status; | |
130 | ||
9f62387d | 131 | port = nn->nfs_callback_tcpport; |
05f4c350 | 132 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 133 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
134 | |
135 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
136 | if (status != 0) | |
137 | goto out; | |
138 | clp->cl_clientid = clid.clientid; | |
139 | clp->cl_confirm = clid.confirm; | |
140 | ||
141 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 142 | if (status == 0) { |
05f4c350 CL |
143 | /* Sustain the lease, even if it's empty. If the clientid4 |
144 | * goes stale it's of no use for trunking discovery. */ | |
145 | nfs4_schedule_state_renewal(*result); | |
05f4c350 | 146 | } |
05f4c350 CL |
147 | out: |
148 | return status; | |
149 | } | |
150 | ||
a7b72103 | 151 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
152 | { |
153 | struct rpc_cred *cred = NULL; | |
154 | ||
a2b2bb88 TM |
155 | if (clp->cl_machine_cred != NULL) |
156 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
157 | return cred; |
158 | } | |
159 | ||
d688f7b8 CL |
160 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
161 | { | |
162 | struct rpc_cred *cred, *new; | |
163 | ||
164 | new = rpc_lookup_machine_cred(NULL); | |
165 | spin_lock(&clp->cl_lock); | |
166 | cred = clp->cl_machine_cred; | |
167 | clp->cl_machine_cred = new; | |
168 | spin_unlock(&clp->cl_lock); | |
169 | if (cred != NULL) | |
170 | put_rpccred(cred); | |
171 | } | |
172 | ||
24d292b8 CL |
173 | static struct rpc_cred * |
174 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 175 | { |
24d292b8 | 176 | struct rpc_cred *cred = NULL; |
b4454fe1 | 177 | struct nfs4_state_owner *sp; |
9f958ab8 | 178 | struct rb_node *pos; |
b4454fe1 | 179 | |
24d292b8 CL |
180 | for (pos = rb_first(&server->state_owners); |
181 | pos != NULL; | |
182 | pos = rb_next(pos)) { | |
183 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
184 | if (list_empty(&sp->so_states)) |
185 | continue; | |
186 | cred = get_rpccred(sp->so_cred); | |
187 | break; | |
188 | } | |
189 | return cred; | |
190 | } | |
191 | ||
24d292b8 CL |
192 | /** |
193 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
194 | * @clp: client state handle | |
195 | * | |
196 | * Returns an rpc_cred with reference count bumped, or NULL. | |
197 | * Caller must hold clp->cl_lock. | |
198 | */ | |
199 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
200 | { | |
201 | struct rpc_cred *cred = NULL; | |
202 | struct nfs_server *server; | |
203 | ||
e49a29bd SP |
204 | /* Use machine credentials if available */ |
205 | cred = nfs4_get_machine_cred_locked(clp); | |
206 | if (cred != NULL) | |
207 | goto out; | |
208 | ||
24d292b8 CL |
209 | rcu_read_lock(); |
210 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
211 | cred = nfs4_get_renew_cred_server_locked(server); | |
212 | if (cred != NULL) | |
213 | break; | |
214 | } | |
215 | rcu_read_unlock(); | |
e49a29bd SP |
216 | |
217 | out: | |
24d292b8 CL |
218 | return cred; |
219 | } | |
220 | ||
62f288a0 | 221 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 222 | { |
774d5f14 | 223 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 224 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 225 | nfs41_wake_slot_table(tbl); |
961a828d | 226 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 227 | } |
9dfdf404 RL |
228 | } |
229 | ||
62f288a0 AA |
230 | static void nfs4_end_drain_session(struct nfs_client *clp) |
231 | { | |
232 | struct nfs4_session *ses = clp->cl_session; | |
233 | ||
2cf8bca8 CL |
234 | if (clp->cl_slot_tbl) { |
235 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
236 | return; | |
237 | } | |
238 | ||
62f288a0 AA |
239 | if (ses != NULL) { |
240 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
241 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
242 | } | |
243 | } | |
244 | ||
774d5f14 | 245 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 246 | { |
774d5f14 | 247 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 248 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 249 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 250 | reinit_completion(&tbl->complete); |
9dfdf404 | 251 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 252 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
253 | } |
254 | spin_unlock(&tbl->slot_tbl_lock); | |
255 | return 0; | |
256 | } | |
257 | ||
42acd021 AA |
258 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
259 | { | |
260 | struct nfs4_session *ses = clp->cl_session; | |
261 | int ret = 0; | |
262 | ||
2cf8bca8 CL |
263 | if (clp->cl_slot_tbl) |
264 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
265 | ||
42acd021 | 266 | /* back channel */ |
774d5f14 | 267 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
268 | if (ret) |
269 | return ret; | |
270 | /* fore channel */ | |
774d5f14 | 271 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
272 | } |
273 | ||
c9fdeb28 CL |
274 | #if defined(CONFIG_NFS_V4_1) |
275 | ||
2cf8bca8 CL |
276 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
277 | { | |
278 | int status; | |
279 | struct nfs_fsinfo fsinfo; | |
280 | ||
281 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
282 | nfs4_schedule_state_renewal(clp); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
287 | if (status == 0) { | |
288 | /* Update lease time and schedule renewal */ | |
289 | spin_lock(&clp->cl_lock); | |
290 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
291 | clp->cl_last_renewal = jiffies; | |
292 | spin_unlock(&clp->cl_lock); | |
293 | ||
294 | nfs4_schedule_state_renewal(clp); | |
295 | } | |
296 | ||
297 | return status; | |
298 | } | |
299 | ||
bda197f5 TM |
300 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
301 | { | |
302 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
303 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
304 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
305 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
306 | nfs41_setup_state_renewal(clp); | |
307 | } | |
308 | ||
4d643d1d AA |
309 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
310 | { | |
311 | int status; | |
312 | ||
fd954ae1 TM |
313 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
314 | goto do_confirm; | |
4d643d1d | 315 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
316 | if (status != 0) |
317 | goto out; | |
fd954ae1 TM |
318 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
319 | do_confirm: | |
848f5bda | 320 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
321 | if (status != 0) |
322 | goto out; | |
bda197f5 | 323 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
324 | nfs_mark_client_ready(clp, NFS_CS_READY); |
325 | out: | |
4d643d1d AA |
326 | return status; |
327 | } | |
328 | ||
05f4c350 CL |
329 | /** |
330 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
331 | * | |
332 | * @clp: nfs_client under test | |
333 | * @result: OUT: found nfs_client, or clp | |
334 | * @cred: credential to use for trunking test | |
335 | * | |
336 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
337 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
338 | * "result". | |
339 | * | |
340 | * Note: The returned client may not yet be marked ready. | |
341 | */ | |
342 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
343 | struct nfs_client **result, | |
344 | struct rpc_cred *cred) | |
345 | { | |
346 | int status; | |
347 | ||
348 | status = nfs4_proc_exchange_id(clp, cred); | |
349 | if (status != NFS4_OK) | |
350 | return status; | |
351 | ||
48d66b97 TM |
352 | status = nfs41_walk_client_list(clp, result, cred); |
353 | if (status < 0) | |
354 | return status; | |
355 | if (clp != *result) | |
356 | return 0; | |
357 | ||
e11259f9 TM |
358 | /* Purge state if the client id was established in a prior instance */ |
359 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) | |
360 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
361 | else | |
362 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
48d66b97 TM |
363 | nfs4_schedule_state_manager(clp); |
364 | status = nfs_wait_client_init_complete(clp); | |
365 | if (status < 0) | |
366 | nfs_put_client(clp); | |
367 | return status; | |
05f4c350 CL |
368 | } |
369 | ||
b4b82607 AA |
370 | #endif /* CONFIG_NFS_V4_1 */ |
371 | ||
24d292b8 | 372 | /** |
73d8bde5 | 373 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
374 | * @clp: client state handle |
375 | * | |
376 | * Returns an rpc_cred with reference count bumped, or NULL. | |
377 | */ | |
73d8bde5 | 378 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 379 | { |
a2b2bb88 | 380 | struct rpc_cred *cred; |
286d7d6a | 381 | |
6dc9d57a TM |
382 | spin_lock(&clp->cl_lock); |
383 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 384 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 385 | return cred; |
286d7d6a TM |
386 | } |
387 | ||
1da177e4 | 388 | static struct nfs4_state_owner * |
24d292b8 | 389 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 390 | { |
24d292b8 | 391 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 392 | *parent = NULL; |
414adf14 | 393 | struct nfs4_state_owner *sp; |
1da177e4 | 394 | |
9f958ab8 TM |
395 | while (*p != NULL) { |
396 | parent = *p; | |
24d292b8 | 397 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
398 | |
399 | if (cred < sp->so_cred) | |
400 | p = &parent->rb_left; | |
401 | else if (cred > sp->so_cred) | |
402 | p = &parent->rb_right; | |
403 | else { | |
0aaaf5c4 CL |
404 | if (!list_empty(&sp->so_lru)) |
405 | list_del_init(&sp->so_lru); | |
9f958ab8 | 406 | atomic_inc(&sp->so_count); |
414adf14 | 407 | return sp; |
9f958ab8 | 408 | } |
1da177e4 | 409 | } |
414adf14 | 410 | return NULL; |
1da177e4 LT |
411 | } |
412 | ||
9f958ab8 | 413 | static struct nfs4_state_owner * |
24d292b8 | 414 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 415 | { |
24d292b8 CL |
416 | struct nfs_server *server = new->so_server; |
417 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
418 | *parent = NULL; |
419 | struct nfs4_state_owner *sp; | |
9157c31d | 420 | int err; |
9f958ab8 TM |
421 | |
422 | while (*p != NULL) { | |
423 | parent = *p; | |
24d292b8 | 424 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
425 | |
426 | if (new->so_cred < sp->so_cred) | |
427 | p = &parent->rb_left; | |
428 | else if (new->so_cred > sp->so_cred) | |
429 | p = &parent->rb_right; | |
430 | else { | |
0aaaf5c4 CL |
431 | if (!list_empty(&sp->so_lru)) |
432 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
433 | atomic_inc(&sp->so_count); |
434 | return sp; | |
435 | } | |
436 | } | |
48c22eb2 | 437 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
438 | if (err) |
439 | return ERR_PTR(err); | |
24d292b8 CL |
440 | rb_link_node(&new->so_server_node, parent, p); |
441 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
442 | return new; |
443 | } | |
444 | ||
445 | static void | |
24d292b8 | 446 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 447 | { |
24d292b8 CL |
448 | struct nfs_server *server = sp->so_server; |
449 | ||
450 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
451 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 452 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
453 | } |
454 | ||
7ba127ab TM |
455 | static void |
456 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
457 | { | |
95b72eb0 | 458 | sc->create_time = ktime_get(); |
7ba127ab TM |
459 | sc->flags = 0; |
460 | sc->counter = 0; | |
461 | spin_lock_init(&sc->lock); | |
462 | INIT_LIST_HEAD(&sc->list); | |
463 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
464 | } | |
465 | ||
466 | static void | |
467 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
468 | { | |
469 | rpc_destroy_wait_queue(&sc->wait); | |
470 | } | |
471 | ||
1da177e4 LT |
472 | /* |
473 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
474 | * create a new state_owner. | |
475 | * | |
476 | */ | |
477 | static struct nfs4_state_owner * | |
d1e284d5 TM |
478 | nfs4_alloc_state_owner(struct nfs_server *server, |
479 | struct rpc_cred *cred, | |
480 | gfp_t gfp_flags) | |
1da177e4 LT |
481 | { |
482 | struct nfs4_state_owner *sp; | |
483 | ||
d1e284d5 | 484 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
485 | if (!sp) |
486 | return NULL; | |
d1e284d5 TM |
487 | sp->so_server = server; |
488 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 489 | spin_lock_init(&sp->so_lock); |
1da177e4 | 490 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 491 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 492 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 493 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 494 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 495 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
496 | return sp; |
497 | } | |
498 | ||
1d2e88e7 | 499 | static void |
1da177e4 LT |
500 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
501 | { | |
c77365c9 TM |
502 | struct rb_node *rb_node = &sp->so_server_node; |
503 | ||
504 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
505 | struct nfs_server *server = sp->so_server; |
506 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
507 | |
508 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
509 | if (!RB_EMPTY_NODE(rb_node)) { |
510 | rb_erase(rb_node, &server->state_owners); | |
511 | RB_CLEAR_NODE(rb_node); | |
512 | } | |
9f958ab8 TM |
513 | spin_unlock(&clp->cl_lock); |
514 | } | |
1da177e4 LT |
515 | } |
516 | ||
0aaaf5c4 CL |
517 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
518 | { | |
7ba127ab | 519 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
520 | put_rpccred(sp->so_cred); |
521 | kfree(sp); | |
522 | } | |
523 | ||
524 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
525 | { | |
526 | struct nfs_client *clp = server->nfs_client; | |
527 | struct nfs4_state_owner *sp, *tmp; | |
528 | unsigned long time_min, time_max; | |
529 | LIST_HEAD(doomed); | |
530 | ||
531 | spin_lock(&clp->cl_lock); | |
532 | time_max = jiffies; | |
533 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
534 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
535 | /* NB: LRU is sorted so that oldest is at the head */ | |
536 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
537 | break; | |
538 | list_move(&sp->so_lru, &doomed); | |
539 | nfs4_remove_state_owner_locked(sp); | |
540 | } | |
541 | spin_unlock(&clp->cl_lock); | |
542 | ||
543 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
544 | list_del(&sp->so_lru); | |
545 | nfs4_free_state_owner(sp); | |
546 | } | |
547 | } | |
548 | ||
24d292b8 CL |
549 | /** |
550 | * nfs4_get_state_owner - Look up a state owner given a credential | |
551 | * @server: nfs_server to search | |
552 | * @cred: RPC credential to match | |
553 | * | |
554 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
555 | */ | |
556 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
557 | struct rpc_cred *cred, |
558 | gfp_t gfp_flags) | |
1da177e4 | 559 | { |
7539bbab | 560 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
561 | struct nfs4_state_owner *sp, *new; |
562 | ||
1da177e4 | 563 | spin_lock(&clp->cl_lock); |
24d292b8 | 564 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 565 | spin_unlock(&clp->cl_lock); |
1da177e4 | 566 | if (sp != NULL) |
0aaaf5c4 | 567 | goto out; |
d1e284d5 | 568 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 569 | if (new == NULL) |
0aaaf5c4 | 570 | goto out; |
9157c31d TM |
571 | do { |
572 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
573 | break; | |
574 | spin_lock(&clp->cl_lock); | |
575 | sp = nfs4_insert_state_owner_locked(new); | |
576 | spin_unlock(&clp->cl_lock); | |
577 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
578 | if (sp != new) |
579 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
580 | out: |
581 | nfs4_gc_state_owners(server); | |
9f958ab8 | 582 | return sp; |
1da177e4 LT |
583 | } |
584 | ||
24d292b8 CL |
585 | /** |
586 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
587 | * @sp: state owner data to release | |
7bf97bc2 TM |
588 | * |
589 | * Note that we keep released state owners on an LRU | |
590 | * list. | |
591 | * This caches valid state owners so that they can be | |
592 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
593 | * It also pins the uniquifier of dropped state owners for | |
594 | * a while, to ensure that those state owner names are | |
595 | * never reused. | |
24d292b8 | 596 | */ |
1da177e4 LT |
597 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
598 | { | |
0aaaf5c4 CL |
599 | struct nfs_server *server = sp->so_server; |
600 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
601 | |
602 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
603 | return; | |
0aaaf5c4 | 604 | |
7bf97bc2 TM |
605 | sp->so_expires = jiffies; |
606 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
607 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
608 | } |
609 | ||
610 | /** | |
611 | * nfs4_purge_state_owners - Release all cached state owners | |
612 | * @server: nfs_server with cached state owners to release | |
613 | * | |
614 | * Called at umount time. Remaining state owners will be on | |
615 | * the LRU with ref count of zero. | |
616 | */ | |
617 | void nfs4_purge_state_owners(struct nfs_server *server) | |
618 | { | |
619 | struct nfs_client *clp = server->nfs_client; | |
620 | struct nfs4_state_owner *sp, *tmp; | |
621 | LIST_HEAD(doomed); | |
622 | ||
623 | spin_lock(&clp->cl_lock); | |
624 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
625 | list_move(&sp->so_lru, &doomed); | |
626 | nfs4_remove_state_owner_locked(sp); | |
627 | } | |
1da177e4 | 628 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
629 | |
630 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
631 | list_del(&sp->so_lru); | |
632 | nfs4_free_state_owner(sp); | |
633 | } | |
1da177e4 LT |
634 | } |
635 | ||
636 | static struct nfs4_state * | |
637 | nfs4_alloc_open_state(void) | |
638 | { | |
639 | struct nfs4_state *state; | |
640 | ||
8535b2be | 641 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
642 | if (!state) |
643 | return NULL; | |
1da177e4 LT |
644 | atomic_set(&state->count, 1); |
645 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 646 | spin_lock_init(&state->state_lock); |
8bda4e4c | 647 | seqlock_init(&state->seqlock); |
1da177e4 LT |
648 | return state; |
649 | } | |
650 | ||
4cecb76f | 651 | void |
dc0b027d | 652 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 653 | { |
dc0b027d | 654 | if (state->state == fmode) |
4cecb76f TM |
655 | return; |
656 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
657 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
658 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
659 | list_move(&state->open_states, &state->owner->so_states); |
660 | else | |
661 | list_move_tail(&state->open_states, &state->owner->so_states); | |
662 | } | |
dc0b027d | 663 | state->state = fmode; |
4cecb76f TM |
664 | } |
665 | ||
1da177e4 LT |
666 | static struct nfs4_state * |
667 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
668 | { | |
669 | struct nfs_inode *nfsi = NFS_I(inode); | |
670 | struct nfs4_state *state; | |
671 | ||
672 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 673 | if (state->owner != owner) |
1da177e4 | 674 | continue; |
5d422301 TM |
675 | if (!nfs4_valid_open_stateid(state)) |
676 | continue; | |
1c816efa | 677 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 678 | return state; |
1da177e4 LT |
679 | } |
680 | return NULL; | |
681 | } | |
682 | ||
1da177e4 LT |
683 | static void |
684 | nfs4_free_open_state(struct nfs4_state *state) | |
685 | { | |
686 | kfree(state); | |
687 | } | |
688 | ||
689 | struct nfs4_state * | |
690 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
691 | { | |
692 | struct nfs4_state *state, *new; | |
693 | struct nfs_inode *nfsi = NFS_I(inode); | |
694 | ||
695 | spin_lock(&inode->i_lock); | |
696 | state = __nfs4_find_state_byowner(inode, owner); | |
697 | spin_unlock(&inode->i_lock); | |
698 | if (state) | |
699 | goto out; | |
700 | new = nfs4_alloc_open_state(); | |
ec073428 | 701 | spin_lock(&owner->so_lock); |
1da177e4 LT |
702 | spin_lock(&inode->i_lock); |
703 | state = __nfs4_find_state_byowner(inode, owner); | |
704 | if (state == NULL && new != NULL) { | |
705 | state = new; | |
1da177e4 LT |
706 | state->owner = owner; |
707 | atomic_inc(&owner->so_count); | |
708 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
709 | ihold(inode); |
710 | state->inode = inode; | |
1da177e4 | 711 | spin_unlock(&inode->i_lock); |
ec073428 TM |
712 | /* Note: The reclaim code dictates that we add stateless |
713 | * and read-only stateids to the end of the list */ | |
714 | list_add_tail(&state->open_states, &owner->so_states); | |
715 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
716 | } else { |
717 | spin_unlock(&inode->i_lock); | |
ec073428 | 718 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
719 | if (new) |
720 | nfs4_free_open_state(new); | |
721 | } | |
722 | out: | |
723 | return state; | |
724 | } | |
725 | ||
1da177e4 LT |
726 | void nfs4_put_open_state(struct nfs4_state *state) |
727 | { | |
728 | struct inode *inode = state->inode; | |
729 | struct nfs4_state_owner *owner = state->owner; | |
730 | ||
ec073428 | 731 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 732 | return; |
ec073428 | 733 | spin_lock(&inode->i_lock); |
ba683031 | 734 | list_del(&state->inode_states); |
1da177e4 | 735 | list_del(&state->open_states); |
ec073428 TM |
736 | spin_unlock(&inode->i_lock); |
737 | spin_unlock(&owner->so_lock); | |
1da177e4 | 738 | iput(inode); |
1da177e4 LT |
739 | nfs4_free_open_state(state); |
740 | nfs4_put_state_owner(owner); | |
741 | } | |
742 | ||
743 | /* | |
83c9d41e | 744 | * Close the current file. |
1da177e4 | 745 | */ |
643168c2 | 746 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 747 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 748 | { |
1da177e4 | 749 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 750 | int call_close = 0; |
dc0b027d | 751 | fmode_t newstate; |
1da177e4 LT |
752 | |
753 | atomic_inc(&owner->so_count); | |
1da177e4 | 754 | /* Protect against nfs4_find_state() */ |
ec073428 | 755 | spin_lock(&owner->so_lock); |
dc0b027d | 756 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
757 | case FMODE_READ: |
758 | state->n_rdonly--; | |
759 | break; | |
760 | case FMODE_WRITE: | |
761 | state->n_wronly--; | |
762 | break; | |
763 | case FMODE_READ|FMODE_WRITE: | |
764 | state->n_rdwr--; | |
765 | } | |
003707c7 | 766 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 767 | if (state->n_rdwr == 0) { |
003707c7 | 768 | if (state->n_rdonly == 0) { |
e7616923 | 769 | newstate &= ~FMODE_READ; |
003707c7 TM |
770 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
771 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
772 | } | |
773 | if (state->n_wronly == 0) { | |
e7616923 | 774 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
775 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
776 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
777 | } | |
778 | if (newstate == 0) | |
779 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 780 | } |
003707c7 | 781 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 782 | spin_unlock(&owner->so_lock); |
4cecb76f | 783 | |
003707c7 | 784 | if (!call_close) { |
b39e625b TM |
785 | nfs4_put_open_state(state); |
786 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
787 | } else |
788 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
789 | } |
790 | ||
643168c2 | 791 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 792 | { |
643168c2 | 793 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
794 | } |
795 | ||
643168c2 | 796 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 797 | { |
643168c2 | 798 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
799 | } |
800 | ||
801 | /* | |
802 | * Search the state->lock_states for an existing lock_owner | |
803 | * that is compatible with current->files | |
804 | */ | |
805 | static struct nfs4_lock_state * | |
8003d3c4 | 806 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
807 | { |
808 | struct nfs4_lock_state *pos; | |
809 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
8003d3c4 | 810 | if (pos->ls_owner != fl_owner) |
1da177e4 LT |
811 | continue; |
812 | atomic_inc(&pos->ls_count); | |
813 | return pos; | |
814 | } | |
815 | return NULL; | |
816 | } | |
817 | ||
1da177e4 LT |
818 | /* |
819 | * Return a compatible lock_state. If no initialized lock_state structure | |
820 | * exists, return an uninitialized one. | |
821 | * | |
1da177e4 | 822 | */ |
8003d3c4 | 823 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
824 | { |
825 | struct nfs4_lock_state *lsp; | |
24d292b8 | 826 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 827 | |
8535b2be | 828 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
829 | if (lsp == NULL) |
830 | return NULL; | |
7ba127ab | 831 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 832 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 833 | lsp->ls_state = state; |
8003d3c4 | 834 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
835 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
836 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 837 | goto out_free; |
8d0a8a9d | 838 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 839 | return lsp; |
d2d7ce28 TM |
840 | out_free: |
841 | kfree(lsp); | |
842 | return NULL; | |
1da177e4 LT |
843 | } |
844 | ||
5ae67c4f | 845 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 846 | { |
48c22eb2 | 847 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 848 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
849 | kfree(lsp); |
850 | } | |
851 | ||
1da177e4 LT |
852 | /* |
853 | * Return a compatible lock_state. If no initialized lock_state structure | |
854 | * exists, return an uninitialized one. | |
855 | * | |
1da177e4 | 856 | */ |
8003d3c4 | 857 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 858 | { |
8d0a8a9d | 859 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 860 | |
8d0a8a9d TM |
861 | for(;;) { |
862 | spin_lock(&state->state_lock); | |
8003d3c4 | 863 | lsp = __nfs4_find_lock_state(state, owner); |
8d0a8a9d TM |
864 | if (lsp != NULL) |
865 | break; | |
866 | if (new != NULL) { | |
8d0a8a9d TM |
867 | list_add(&new->ls_locks, &state->lock_states); |
868 | set_bit(LK_STATE_IN_USE, &state->flags); | |
869 | lsp = new; | |
870 | new = NULL; | |
871 | break; | |
872 | } | |
873 | spin_unlock(&state->state_lock); | |
8003d3c4 | 874 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
875 | if (new == NULL) |
876 | return NULL; | |
877 | } | |
878 | spin_unlock(&state->state_lock); | |
9f958ab8 | 879 | if (new != NULL) |
5ae67c4f | 880 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
881 | return lsp; |
882 | } | |
883 | ||
884 | /* | |
8d0a8a9d TM |
885 | * Release reference to lock_state, and free it if we see that |
886 | * it is no longer in use | |
1da177e4 | 887 | */ |
faf5f49c | 888 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 889 | { |
c8b2d0bf | 890 | struct nfs_server *server; |
8d0a8a9d | 891 | struct nfs4_state *state; |
1da177e4 | 892 | |
8d0a8a9d TM |
893 | if (lsp == NULL) |
894 | return; | |
895 | state = lsp->ls_state; | |
896 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
897 | return; | |
898 | list_del(&lsp->ls_locks); | |
899 | if (list_empty(&state->lock_states)) | |
900 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
901 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
902 | server = state->owner->so_server; |
903 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
904 | struct nfs_client *clp = server->nfs_client; | |
905 | ||
906 | clp->cl_mvops->free_lock_state(server, lsp); | |
907 | } else | |
c8b2d0bf | 908 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
909 | } |
910 | ||
8d0a8a9d | 911 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 912 | { |
8d0a8a9d | 913 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 914 | |
8d0a8a9d TM |
915 | dst->fl_u.nfs4_fl.owner = lsp; |
916 | atomic_inc(&lsp->ls_count); | |
917 | } | |
1da177e4 | 918 | |
8d0a8a9d | 919 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 920 | { |
8d0a8a9d | 921 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
922 | } |
923 | ||
6aed6285 | 924 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
925 | .fl_copy_lock = nfs4_fl_copy_lock, |
926 | .fl_release_private = nfs4_fl_release_lock, | |
927 | }; | |
928 | ||
929 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 930 | { |
8d0a8a9d TM |
931 | struct nfs4_lock_state *lsp; |
932 | ||
933 | if (fl->fl_ops != NULL) | |
934 | return 0; | |
8003d3c4 | 935 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
936 | if (lsp == NULL) |
937 | return -ENOMEM; | |
938 | fl->fl_u.nfs4_fl.owner = lsp; | |
939 | fl->fl_ops = &nfs4_fl_lock_ops; | |
940 | return 0; | |
1da177e4 LT |
941 | } |
942 | ||
5521abfd TM |
943 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
944 | struct nfs4_state *state, | |
2a369153 | 945 | const struct nfs_lockowner *lockowner) |
1da177e4 | 946 | { |
8d0a8a9d | 947 | struct nfs4_lock_state *lsp; |
2a369153 | 948 | fl_owner_t fl_owner; |
5521abfd | 949 | int ret = -ENOENT; |
1da177e4 | 950 | |
2a369153 TM |
951 | |
952 | if (lockowner == NULL) | |
953 | goto out; | |
954 | ||
8d0a8a9d | 955 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 956 | goto out; |
1da177e4 | 957 | |
2a369153 | 958 | fl_owner = lockowner->l_owner; |
8d0a8a9d | 959 | spin_lock(&state->state_lock); |
8003d3c4 | 960 | lsp = __nfs4_find_lock_state(state, fl_owner); |
ef1820f9 N |
961 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
962 | ret = -EIO; | |
963 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 964 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 965 | ret = 0; |
4fc8796d | 966 | } |
8d0a8a9d | 967 | spin_unlock(&state->state_lock); |
1da177e4 | 968 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
969 | out: |
970 | return ret; | |
971 | } | |
972 | ||
927864cd | 973 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 974 | { |
92b40e93 | 975 | const nfs4_stateid *src; |
4fc8796d TM |
976 | int seq; |
977 | ||
978 | do { | |
92b40e93 | 979 | src = &zero_stateid; |
4fc8796d | 980 | seq = read_seqbegin(&state->seqlock); |
92b40e93 TM |
981 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
982 | src = &state->open_stateid; | |
983 | nfs4_stateid_copy(dst, src); | |
4fc8796d TM |
984 | } while (read_seqretry(&state->seqlock, seq)); |
985 | } | |
986 | ||
987 | /* | |
988 | * Byte-range lock aware utility to initialize the stateid of read/write | |
989 | * requests. | |
990 | */ | |
abf4e13c TM |
991 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
992 | fmode_t fmode, const struct nfs_lockowner *lockowner, | |
993 | nfs4_stateid *dst, struct rpc_cred **cred) | |
4fc8796d | 994 | { |
abf4e13c TM |
995 | int ret; |
996 | ||
997 | if (cred != NULL) | |
998 | *cred = NULL; | |
999 | ret = nfs4_copy_lock_stateid(dst, state, lockowner); | |
ef1820f9 N |
1000 | if (ret == -EIO) |
1001 | /* A lost lock - don't even consider delegations */ | |
1002 | goto out; | |
146d70ca | 1003 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1004 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1005 | ret = 0; |
5521abfd | 1006 | goto out; |
146d70ca | 1007 | } |
5521abfd | 1008 | if (ret != -ENOENT) |
ef1820f9 N |
1009 | /* nfs4_copy_delegation_stateid() didn't over-write |
1010 | * dst, so it still has the lock stateid which we now | |
1011 | * choose to use. | |
1012 | */ | |
5521abfd | 1013 | goto out; |
927864cd TM |
1014 | nfs4_copy_open_stateid(dst, state); |
1015 | ret = 0; | |
5521abfd | 1016 | out: |
3b66486c TM |
1017 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1018 | dst->seqid = 0; | |
5521abfd | 1019 | return ret; |
1da177e4 LT |
1020 | } |
1021 | ||
8535b2be | 1022 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1023 | { |
cee54fc9 TM |
1024 | struct nfs_seqid *new; |
1025 | ||
8535b2be | 1026 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1027 | if (new == NULL) |
1028 | return ERR_PTR(-ENOMEM); | |
1029 | new->sequence = counter; | |
1030 | INIT_LIST_HEAD(&new->list); | |
1031 | new->task = NULL; | |
cee54fc9 TM |
1032 | return new; |
1033 | } | |
1034 | ||
72211dbe | 1035 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1036 | { |
4601df20 | 1037 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1038 | |
a6796419 | 1039 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1040 | return; |
1041 | sequence = seqid->sequence; | |
1042 | spin_lock(&sequence->lock); | |
1043 | list_del_init(&seqid->list); | |
1044 | if (!list_empty(&sequence->list)) { | |
1045 | struct nfs_seqid *next; | |
1046 | ||
1047 | next = list_first_entry(&sequence->list, | |
1048 | struct nfs_seqid, list); | |
1049 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1050 | } |
4601df20 | 1051 | spin_unlock(&sequence->lock); |
72211dbe TM |
1052 | } |
1053 | ||
1054 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1055 | { | |
1056 | nfs_release_seqid(seqid); | |
cee54fc9 | 1057 | kfree(seqid); |
1da177e4 LT |
1058 | } |
1059 | ||
1060 | /* | |
cee54fc9 TM |
1061 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1062 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1063 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1064 | */ |
88d90939 | 1065 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1066 | { |
1067 | switch (status) { | |
1068 | case 0: | |
1069 | break; | |
1070 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1071 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1072 | return; | |
9a3ba432 | 1073 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1074 | " sequence-id error on an" |
1075 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1076 | seqid->sequence); |
cee54fc9 TM |
1077 | case -NFS4ERR_STALE_CLIENTID: |
1078 | case -NFS4ERR_STALE_STATEID: | |
1079 | case -NFS4ERR_BAD_STATEID: | |
1080 | case -NFS4ERR_BADXDR: | |
1081 | case -NFS4ERR_RESOURCE: | |
1082 | case -NFS4ERR_NOFILEHANDLE: | |
1083 | /* Non-seqid mutating errors */ | |
1084 | return; | |
1085 | }; | |
1086 | /* | |
1087 | * Note: no locking needed as we are guaranteed to be first | |
1088 | * on the sequence list | |
1089 | */ | |
1090 | seqid->sequence->counter++; | |
1091 | } | |
1092 | ||
1093 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1094 | { | |
a6796419 TM |
1095 | struct nfs4_state_owner *sp; |
1096 | ||
1097 | if (seqid == NULL) | |
1098 | return; | |
34dc1ad7 | 1099 | |
a6796419 | 1100 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1101 | if (status == -NFS4ERR_BAD_SEQID) |
1da177e4 | 1102 | nfs4_drop_state_owner(sp); |
a6796419 | 1103 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1104 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1105 | } |
1106 | ||
1107 | /* | |
cee54fc9 TM |
1108 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1109 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1110 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1111 | */ |
1112 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1113 | { | |
a6796419 TM |
1114 | if (seqid != NULL) |
1115 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1116 | } |
1117 | ||
1118 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1119 | { | |
a6796419 | 1120 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1121 | int status = 0; |
1122 | ||
a6796419 TM |
1123 | if (seqid == NULL) |
1124 | goto out; | |
1125 | sequence = seqid->sequence; | |
cee54fc9 | 1126 | spin_lock(&sequence->lock); |
4601df20 | 1127 | seqid->task = task; |
2f74c0a0 TM |
1128 | if (list_empty(&seqid->list)) |
1129 | list_add_tail(&seqid->list, &sequence->list); | |
1130 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1131 | goto unlock; | |
5d00837b | 1132 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1133 | status = -EAGAIN; |
1134 | unlock: | |
cee54fc9 | 1135 | spin_unlock(&sequence->lock); |
a6796419 | 1136 | out: |
cee54fc9 | 1137 | return status; |
1da177e4 LT |
1138 | } |
1139 | ||
e005e804 | 1140 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1141 | |
e005e804 | 1142 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1143 | { |
4e857c58 | 1144 | smp_mb__before_atomic(); |
e005e804 | 1145 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1146 | smp_mb__after_atomic(); |
e005e804 | 1147 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1148 | rpc_wake_up(&clp->cl_rpcwaitq); |
1149 | } | |
1150 | ||
1da177e4 | 1151 | /* |
e005e804 | 1152 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1153 | */ |
b0d3ded1 | 1154 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1155 | { |
5043e900 | 1156 | struct task_struct *task; |
2446ab60 | 1157 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1158 | |
e005e804 TM |
1159 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1160 | return; | |
5043e900 TM |
1161 | __module_get(THIS_MODULE); |
1162 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1163 | |
1164 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1165 | * manager is the only thread that ever changes the rpc_xprt | |
1166 | * after it's initialized. At this point, we're single threaded. */ | |
1167 | rcu_read_lock(); | |
1168 | snprintf(buf, sizeof(buf), "%s-manager", | |
1169 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1170 | rcu_read_unlock(); | |
f170168b | 1171 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1172 | if (IS_ERR(task)) { |
1173 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1174 | __func__, PTR_ERR(task)); | |
1175 | nfs4_clear_state_manager_bit(clp); | |
1176 | nfs_put_client(clp); | |
1177 | module_put(THIS_MODULE); | |
1178 | } | |
1da177e4 LT |
1179 | } |
1180 | ||
1181 | /* | |
0400a6b0 | 1182 | * Schedule a lease recovery attempt |
1da177e4 | 1183 | */ |
0400a6b0 | 1184 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1185 | { |
1186 | if (!clp) | |
1187 | return; | |
e598d843 TM |
1188 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1189 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1190 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1191 | clp->cl_hostname); | |
e005e804 | 1192 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1193 | } |
9cb81968 | 1194 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1195 | |
c9fdeb28 CL |
1196 | /** |
1197 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1198 | * | |
1199 | * @server: FSID that is migrating | |
1200 | * | |
1201 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1202 | * value is returned. | |
1203 | */ | |
1204 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1205 | { | |
1206 | struct nfs_client *clp = server->nfs_client; | |
1207 | ||
1208 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1209 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1210 | clp->cl_hostname); | |
1211 | return -NFS4ERR_IO; | |
1212 | } | |
1213 | ||
1214 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1215 | return -NFS4ERR_IO; | |
1216 | ||
1217 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1218 | __func__, | |
1219 | (unsigned long long)server->fsid.major, | |
1220 | (unsigned long long)server->fsid.minor, | |
1221 | clp->cl_hostname); | |
1222 | ||
1223 | set_bit(NFS_MIG_IN_TRANSITION, | |
1224 | &((struct nfs_server *)server)->mig_status); | |
1225 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1226 | ||
1227 | nfs4_schedule_state_manager(clp); | |
1228 | return 0; | |
1229 | } | |
1230 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1231 | ||
b7f7a66e CL |
1232 | /** |
1233 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1234 | * | |
1235 | * @clp: server to check for moved leases | |
1236 | * | |
1237 | */ | |
1238 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1239 | { | |
1240 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1241 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1242 | ||
1243 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1244 | nfs4_schedule_state_manager(clp); | |
1245 | } | |
1246 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1247 | ||
33021279 TM |
1248 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1249 | { | |
1250 | int res; | |
1251 | ||
1252 | might_sleep(); | |
1253 | ||
0625c2dd | 1254 | atomic_inc(&clp->cl_count); |
74316201 N |
1255 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1256 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1257 | if (res) |
0625c2dd | 1258 | goto out; |
33021279 | 1259 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1260 | res = clp->cl_cons_state; |
1261 | out: | |
1262 | nfs_put_client(clp); | |
1263 | return res; | |
33021279 TM |
1264 | } |
1265 | ||
1266 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1267 | { | |
1268 | unsigned int loop; | |
1269 | int ret; | |
1270 | ||
1271 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1272 | ret = nfs4_wait_clnt_recover(clp); | |
1273 | if (ret != 0) | |
1274 | break; | |
1275 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1276 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1277 | break; | |
1278 | nfs4_schedule_state_manager(clp); | |
1279 | ret = -EIO; | |
1280 | } | |
1281 | return ret; | |
1282 | } | |
1283 | ||
ad1e3968 TM |
1284 | /* |
1285 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1286 | * @clp: client to process | |
1287 | * | |
1288 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1289 | * resend of the SETCLIENTID and hence re-establish the | |
1290 | * callback channel. Then return all existing delegations. | |
1291 | */ | |
1292 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1293 | { | |
1294 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1295 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1296 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1297 | clp->cl_hostname); | |
ad1e3968 TM |
1298 | } |
1299 | ||
042b60be TM |
1300 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1301 | { | |
ad1e3968 | 1302 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1303 | nfs4_schedule_state_manager(clp); |
1304 | } | |
1305 | ||
f9feab1e | 1306 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1307 | { |
1308 | ||
1309 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1310 | /* Don't recover state that expired before the reboot */ | |
1311 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1312 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1313 | return 0; | |
1314 | } | |
7eff03ae | 1315 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1316 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1317 | return 1; | |
1318 | } | |
1319 | ||
4f14c194 | 1320 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1321 | { |
1322 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1323 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1324 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1325 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1326 | return 1; | |
1327 | } | |
1328 | ||
5d422301 | 1329 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1330 | { |
1331 | struct nfs_client *clp = server->nfs_client; | |
1332 | ||
5d422301 TM |
1333 | if (!nfs4_valid_open_stateid(state)) |
1334 | return -EBADF; | |
0400a6b0 | 1335 | nfs4_state_mark_reclaim_nograce(clp, state); |
cc0a9843 TM |
1336 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1337 | clp->cl_hostname); | |
0400a6b0 | 1338 | nfs4_schedule_state_manager(clp); |
5d422301 | 1339 | return 0; |
0400a6b0 | 1340 | } |
9cb81968 | 1341 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1342 | |
a1d0b5ee TM |
1343 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1344 | const nfs4_stateid *stateid) | |
1345 | { | |
1346 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1347 | struct nfs_inode *nfsi = NFS_I(inode); | |
1348 | struct nfs_open_context *ctx; | |
1349 | struct nfs4_state *state; | |
1350 | bool found = false; | |
1351 | ||
1352 | spin_lock(&inode->i_lock); | |
1353 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1354 | state = ctx->state; | |
1355 | if (state == NULL) | |
1356 | continue; | |
1357 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1358 | continue; | |
f597c537 | 1359 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1360 | continue; |
1361 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1362 | found = true; | |
1363 | } | |
1364 | spin_unlock(&inode->i_lock); | |
1365 | if (found) | |
1366 | nfs4_schedule_state_manager(clp); | |
1367 | } | |
1368 | ||
c58c8441 TM |
1369 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1370 | { | |
1371 | struct inode *inode = state->inode; | |
1372 | struct nfs_inode *nfsi = NFS_I(inode); | |
1373 | struct nfs_open_context *ctx; | |
1374 | ||
1375 | spin_lock(&inode->i_lock); | |
1376 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1377 | if (ctx->state != state) | |
1378 | continue; | |
1379 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1380 | } | |
1381 | spin_unlock(&inode->i_lock); | |
1382 | } | |
1383 | ||
5d422301 TM |
1384 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1385 | { | |
1386 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1387 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1388 | } |
1389 | ||
a1d0b5ee | 1390 | |
02860014 | 1391 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1392 | { |
1393 | struct inode *inode = state->inode; | |
19e03c57 | 1394 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1395 | struct file_lock *fl; |
1396 | int status = 0; | |
5263e31e | 1397 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1398 | struct list_head *list; |
1da177e4 | 1399 | |
bd61e0a9 | 1400 | if (flctx == NULL) |
3f09df70 TM |
1401 | return 0; |
1402 | ||
bd61e0a9 JL |
1403 | list = &flctx->flc_posix; |
1404 | ||
3f09df70 | 1405 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1406 | down_write(&nfsi->rwsem); |
6109c850 | 1407 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1408 | restart: |
1409 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1410 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1411 | continue; | |
6109c850 | 1412 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1413 | status = ops->recover_lock(state, fl); |
1414 | switch (status) { | |
1415 | case 0: | |
1416 | break; | |
1417 | case -ESTALE: | |
1418 | case -NFS4ERR_ADMIN_REVOKED: | |
1419 | case -NFS4ERR_STALE_STATEID: | |
1420 | case -NFS4ERR_BAD_STATEID: | |
1421 | case -NFS4ERR_EXPIRED: | |
1422 | case -NFS4ERR_NO_GRACE: | |
1423 | case -NFS4ERR_STALE_CLIENTID: | |
1424 | case -NFS4ERR_BADSESSION: | |
1425 | case -NFS4ERR_BADSLOT: | |
1426 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1427 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1428 | goto out; | |
1429 | default: | |
1430 | pr_err("NFS: %s: unhandled error %d\n", | |
1431 | __func__, status); | |
1432 | case -ENOMEM: | |
1433 | case -NFS4ERR_DENIED: | |
1434 | case -NFS4ERR_RECLAIM_BAD: | |
1435 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1436 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
1437 | status = 0; | |
1438 | } | |
6109c850 | 1439 | spin_lock(&flctx->flc_lock); |
5263e31e | 1440 | } |
bd61e0a9 JL |
1441 | if (list == &flctx->flc_posix) { |
1442 | list = &flctx->flc_flock; | |
1443 | goto restart; | |
1444 | } | |
6109c850 | 1445 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1446 | out: |
19e03c57 | 1447 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1448 | return status; |
1449 | } | |
1450 | ||
02860014 | 1451 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1452 | { |
1453 | struct nfs4_state *state; | |
1454 | struct nfs4_lock_state *lock; | |
1455 | int status = 0; | |
1456 | ||
1457 | /* Note: we rely on the sp->so_states list being ordered | |
1458 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1459 | * states first. | |
1460 | * This is needed to ensure that the server won't give us any | |
1461 | * read delegations that we have to return if, say, we are | |
1462 | * recovering after a network partition or a reboot from a | |
1463 | * server that doesn't support a grace period. | |
1464 | */ | |
fe1d8195 | 1465 | spin_lock(&sp->so_lock); |
abbec2da | 1466 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1467 | restart: |
1da177e4 | 1468 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1469 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1470 | continue; | |
5d422301 TM |
1471 | if (!nfs4_valid_open_stateid(state)) |
1472 | continue; | |
1da177e4 LT |
1473 | if (state->state == 0) |
1474 | continue; | |
fe1d8195 TM |
1475 | atomic_inc(&state->count); |
1476 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1477 | status = ops->recover_open(sp, state); |
1da177e4 | 1478 | if (status >= 0) { |
02860014 TM |
1479 | status = nfs4_reclaim_locks(state, ops); |
1480 | if (status >= 0) { | |
1acd1c30 | 1481 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1482 | spin_lock(&state->state_lock); |
1483 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1484 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1485 | pr_warn_ratelimited("NFS: " | |
1486 | "%s: Lock reclaim " | |
1487 | "failed!\n", __func__); | |
1488 | } | |
1489 | spin_unlock(&state->state_lock); | |
02860014 | 1490 | } |
a41cbe86 | 1491 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, |
e8d975e7 | 1492 | &state->flags); |
cea7f829 | 1493 | nfs4_put_open_state(state); |
c137afab | 1494 | spin_lock(&sp->so_lock); |
fe1d8195 | 1495 | goto restart; |
1da177e4 | 1496 | } |
1da177e4 LT |
1497 | } |
1498 | switch (status) { | |
1499 | default: | |
3660cd43 AA |
1500 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1501 | __func__, status); | |
1da177e4 | 1502 | case -ENOENT: |
965b5d67 | 1503 | case -ENOMEM: |
b79a4a1b | 1504 | case -ESTALE: |
3660cd43 | 1505 | /* Open state on this file cannot be recovered */ |
5d422301 | 1506 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1507 | break; |
91876b13 TM |
1508 | case -EAGAIN: |
1509 | ssleep(1); | |
965b5d67 TM |
1510 | case -NFS4ERR_ADMIN_REVOKED: |
1511 | case -NFS4ERR_STALE_STATEID: | |
1512 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1513 | case -NFS4ERR_RECLAIM_BAD: |
1514 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1515 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1516 | break; |
1da177e4 LT |
1517 | case -NFS4ERR_EXPIRED: |
1518 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1519 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1520 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1521 | case -NFS4ERR_BADSESSION: |
1522 | case -NFS4ERR_BADSLOT: | |
1523 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1524 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1525 | goto out_err; |
1526 | } | |
fe1d8195 | 1527 | nfs4_put_open_state(state); |
c137afab | 1528 | spin_lock(&sp->so_lock); |
fe1d8195 | 1529 | goto restart; |
1da177e4 | 1530 | } |
abbec2da | 1531 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1532 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1533 | return 0; |
1534 | out_err: | |
fe1d8195 | 1535 | nfs4_put_open_state(state); |
c137afab | 1536 | spin_lock(&sp->so_lock); |
abbec2da | 1537 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1538 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1539 | return status; |
1540 | } | |
1541 | ||
b79a4a1b TM |
1542 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1543 | { | |
1544 | struct nfs4_lock_state *lock; | |
1545 | ||
1546 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1547 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1548 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1549 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1550 | spin_lock(&state->state_lock); |
b79a4a1b | 1551 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1552 | lock->ls_seqid.flags = 0; |
795a88c9 | 1553 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1554 | } |
4b44b40e | 1555 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1556 | } |
1557 | ||
24d292b8 CL |
1558 | static void nfs4_reset_seqids(struct nfs_server *server, |
1559 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1560 | { |
24d292b8 | 1561 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1562 | struct nfs4_state_owner *sp; |
9f958ab8 | 1563 | struct rb_node *pos; |
cee54fc9 | 1564 | struct nfs4_state *state; |
cee54fc9 | 1565 | |
24d292b8 CL |
1566 | spin_lock(&clp->cl_lock); |
1567 | for (pos = rb_first(&server->state_owners); | |
1568 | pos != NULL; | |
1569 | pos = rb_next(pos)) { | |
1570 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1571 | sp->so_seqid.flags = 0; |
ec073428 | 1572 | spin_lock(&sp->so_lock); |
cee54fc9 | 1573 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1574 | if (mark_reclaim(clp, state)) |
1575 | nfs4_clear_open_state(state); | |
cee54fc9 | 1576 | } |
ec073428 | 1577 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1578 | } |
24d292b8 CL |
1579 | spin_unlock(&clp->cl_lock); |
1580 | } | |
1581 | ||
1582 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1583 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1584 | { | |
1585 | struct nfs_server *server; | |
1586 | ||
1587 | rcu_read_lock(); | |
1588 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1589 | nfs4_reset_seqids(server, mark_reclaim); | |
1590 | rcu_read_unlock(); | |
cee54fc9 TM |
1591 | } |
1592 | ||
b79a4a1b TM |
1593 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1594 | { | |
1595 | /* Mark all delegations for reclaim */ | |
1596 | nfs_delegation_mark_reclaim(clp); | |
1597 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1598 | } | |
1599 | ||
fce5c838 | 1600 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1601 | const struct nfs4_state_recovery_ops *ops, |
1602 | struct rpc_cred *cred) | |
fce5c838 RL |
1603 | { |
1604 | /* Notify the server we're done reclaiming our state */ | |
1605 | if (ops->reclaim_complete) | |
965e9c23 | 1606 | (void)ops->reclaim_complete(clp, cred); |
fce5c838 RL |
1607 | } |
1608 | ||
24d292b8 | 1609 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1610 | { |
24d292b8 | 1611 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1612 | struct nfs4_state_owner *sp; |
1613 | struct rb_node *pos; | |
1614 | struct nfs4_state *state; | |
1615 | ||
24d292b8 CL |
1616 | spin_lock(&clp->cl_lock); |
1617 | for (pos = rb_first(&server->state_owners); | |
1618 | pos != NULL; | |
1619 | pos = rb_next(pos)) { | |
1620 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1621 | spin_lock(&sp->so_lock); |
1622 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1623 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1624 | &state->flags)) | |
b79a4a1b TM |
1625 | continue; |
1626 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1627 | } | |
1628 | spin_unlock(&sp->so_lock); | |
1629 | } | |
24d292b8 CL |
1630 | spin_unlock(&clp->cl_lock); |
1631 | } | |
1632 | ||
1633 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1634 | { | |
1635 | struct nfs_server *server; | |
1636 | ||
1637 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1638 | return 0; | |
1639 | ||
1640 | rcu_read_lock(); | |
1641 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1642 | nfs4_clear_reclaim_server(server); | |
1643 | rcu_read_unlock(); | |
b79a4a1b TM |
1644 | |
1645 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1646 | return 1; |
1647 | } | |
1648 | ||
1649 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1650 | { | |
965e9c23 TM |
1651 | const struct nfs4_state_recovery_ops *ops; |
1652 | struct rpc_cred *cred; | |
1653 | ||
6eaa6149 TM |
1654 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1655 | return; | |
965e9c23 | 1656 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1657 | cred = nfs4_get_clid_cred(clp); |
965e9c23 TM |
1658 | nfs4_reclaim_complete(clp, ops, cred); |
1659 | put_rpccred(cred); | |
b79a4a1b TM |
1660 | } |
1661 | ||
1662 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1663 | { | |
1664 | nfs_delegation_mark_reclaim(clp); | |
1665 | nfs_delegation_reap_unclaimed(clp); | |
1666 | } | |
1667 | ||
1668 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1669 | { | |
1670 | nfs_delegation_clear_all(clp); | |
1671 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1672 | } | |
1673 | ||
4f7cdf18 | 1674 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1675 | { |
1676 | switch (error) { | |
4f38e4aa TM |
1677 | case 0: |
1678 | break; | |
e598d843 | 1679 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1680 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1681 | break; |
c8b7ae3d TM |
1682 | case -NFS4ERR_NO_GRACE: |
1683 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1684 | break; |
e598d843 | 1685 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 | 1686 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
6eaa6149 | 1687 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1688 | nfs4_state_start_reclaim_reboot(clp); |
1689 | break; | |
1690 | case -NFS4ERR_EXPIRED: | |
1691 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1692 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1693 | break; |
c3fad1b1 AA |
1694 | case -NFS4ERR_BADSESSION: |
1695 | case -NFS4ERR_BADSLOT: | |
1696 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1697 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1698 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1699 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1700 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1701 | /* Zero session reset errors */ |
4f38e4aa | 1702 | break; |
7c5d7256 TM |
1703 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1704 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1705 | break; | |
4f38e4aa | 1706 | default: |
cc0a9843 TM |
1707 | dprintk("%s: failed to handle error %d for server %s\n", |
1708 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1709 | return error; |
e598d843 | 1710 | } |
cc0a9843 TM |
1711 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1712 | clp->cl_hostname); | |
4f38e4aa | 1713 | return 0; |
e598d843 TM |
1714 | } |
1715 | ||
02860014 | 1716 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1717 | { |
24d292b8 CL |
1718 | struct nfs4_state_owner *sp; |
1719 | struct nfs_server *server; | |
9f958ab8 | 1720 | struct rb_node *pos; |
1da177e4 LT |
1721 | int status = 0; |
1722 | ||
7eff03ae | 1723 | restart: |
24d292b8 CL |
1724 | rcu_read_lock(); |
1725 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1726 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1727 | spin_lock(&clp->cl_lock); |
1728 | for (pos = rb_first(&server->state_owners); | |
1729 | pos != NULL; | |
1730 | pos = rb_next(pos)) { | |
1731 | sp = rb_entry(pos, | |
1732 | struct nfs4_state_owner, so_server_node); | |
1733 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1734 | &sp->so_flags)) | |
1735 | continue; | |
4a0954ef TM |
1736 | if (!atomic_inc_not_zero(&sp->so_count)) |
1737 | continue; | |
24d292b8 CL |
1738 | spin_unlock(&clp->cl_lock); |
1739 | rcu_read_unlock(); | |
1740 | ||
1741 | status = nfs4_reclaim_open_state(sp, ops); | |
1742 | if (status < 0) { | |
1743 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1744 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1745 | status = nfs4_recovery_handle_error(clp, status); |
1746 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1747 | } |
1748 | ||
7eff03ae | 1749 | nfs4_put_state_owner(sp); |
24d292b8 | 1750 | goto restart; |
7eff03ae | 1751 | } |
24d292b8 | 1752 | spin_unlock(&clp->cl_lock); |
02860014 | 1753 | } |
24d292b8 | 1754 | rcu_read_unlock(); |
df817ba3 | 1755 | return 0; |
02860014 TM |
1756 | } |
1757 | ||
1758 | static int nfs4_check_lease(struct nfs_client *clp) | |
1759 | { | |
1760 | struct rpc_cred *cred; | |
c48f4f35 TM |
1761 | const struct nfs4_state_maintenance_ops *ops = |
1762 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1763 | int status; |
1da177e4 | 1764 | |
0f605b56 TM |
1765 | /* Is the client already known to have an expired lease? */ |
1766 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1767 | return 0; | |
a7b72103 AA |
1768 | spin_lock(&clp->cl_lock); |
1769 | cred = ops->get_state_renewal_cred_locked(clp); | |
1770 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1771 | if (cred == NULL) { |
73d8bde5 | 1772 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1773 | status = -ENOKEY; |
0f605b56 TM |
1774 | if (cred == NULL) |
1775 | goto out; | |
286d7d6a | 1776 | } |
8e69514f | 1777 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1778 | put_rpccred(cred); |
bc7a05ca TM |
1779 | if (status == -ETIMEDOUT) { |
1780 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1781 | return 0; | |
1782 | } | |
0f605b56 | 1783 | out: |
4f7cdf18 | 1784 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1785 | } |
1786 | ||
47b803c8 AA |
1787 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1788 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1789 | */ |
1790 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1791 | { | |
1792 | switch (status) { | |
89a21736 TM |
1793 | case -NFS4ERR_SEQ_MISORDERED: |
1794 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1795 | return -ESERVERFAULT; | |
1796 | /* Lease confirmation error: retry after purging the lease */ | |
1797 | ssleep(1); | |
47b803c8 AA |
1798 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1799 | break; | |
2a6ee6aa TM |
1800 | case -NFS4ERR_STALE_CLIENTID: |
1801 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1802 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1803 | break; |
de734831 CL |
1804 | case -NFS4ERR_CLID_INUSE: |
1805 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1806 | clp->cl_hostname); | |
1807 | nfs_mark_client_ready(clp, -EPERM); | |
1808 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1809 | return -EPERM; | |
2a6ee6aa | 1810 | case -EACCES: |
2a6ee6aa TM |
1811 | case -NFS4ERR_DELAY: |
1812 | case -ETIMEDOUT: | |
1813 | case -EAGAIN: | |
1814 | ssleep(1); | |
1815 | break; | |
1816 | ||
1817 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1818 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1819 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1820 | dprintk("%s: exit with error %d for server %s\n", |
1821 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1822 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1823 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1824 | * in nfs4_exchange_id */ | |
1825 | default: | |
cc0a9843 TM |
1826 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1827 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1828 | return status; |
1829 | } | |
1830 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1831 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1832 | clp->cl_hostname); | |
2a6ee6aa TM |
1833 | return 0; |
1834 | } | |
1835 | ||
b42353ff | 1836 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1837 | { |
1838 | struct rpc_cred *cred; | |
c48f4f35 TM |
1839 | const struct nfs4_state_recovery_ops *ops = |
1840 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1841 | int status; |
02860014 | 1842 | |
5cae02f4 | 1843 | nfs4_begin_drain_session(clp); |
73d8bde5 | 1844 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1845 | if (cred == NULL) |
1846 | return -ENOENT; | |
1847 | status = ops->establish_clid(clp, cred); | |
1848 | put_rpccred(cred); | |
1849 | if (status != 0) | |
b42353ff TM |
1850 | return status; |
1851 | pnfs_destroy_all_layouts(clp); | |
1852 | return 0; | |
1853 | } | |
1854 | ||
6bbb4ae8 CL |
1855 | /* |
1856 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1857 | * to local errno values. | |
1858 | */ | |
b42353ff TM |
1859 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1860 | { | |
1861 | int status; | |
1862 | ||
1863 | status = nfs4_establish_lease(clp); | |
1864 | if (status < 0) | |
1865 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1866 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1867 | nfs4_state_start_reclaim_nograce(clp); | |
1868 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1869 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1870 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1871 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1872 | return 0; | |
1873 | } | |
1874 | ||
1875 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1876 | { | |
1877 | int status; | |
1878 | ||
1879 | status = nfs4_establish_lease(clp); | |
1880 | if (status < 0) | |
2a6ee6aa | 1881 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1882 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1883 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1884 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1885 | return 0; |
02860014 TM |
1886 | } |
1887 | ||
c9fdeb28 CL |
1888 | /* |
1889 | * Try remote migration of one FSID from a source server to a | |
1890 | * destination server. The source server provides a list of | |
1891 | * potential destinations. | |
1892 | * | |
1893 | * Returns zero or a negative NFS4ERR status code. | |
1894 | */ | |
1895 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1896 | { | |
1897 | struct nfs_client *clp = server->nfs_client; | |
1898 | struct nfs4_fs_locations *locations = NULL; | |
1899 | struct inode *inode; | |
1900 | struct page *page; | |
1901 | int status, result; | |
1902 | ||
1903 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1904 | (unsigned long long)server->fsid.major, | |
1905 | (unsigned long long)server->fsid.minor, | |
1906 | clp->cl_hostname); | |
1907 | ||
1908 | result = 0; | |
1909 | page = alloc_page(GFP_KERNEL); | |
1910 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1911 | if (page == NULL || locations == NULL) { | |
1912 | dprintk("<-- %s: no memory\n", __func__); | |
1913 | goto out; | |
1914 | } | |
1915 | ||
2b0143b5 | 1916 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
1917 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
1918 | if (result) { | |
1919 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
1920 | __func__, result); | |
1921 | goto out; | |
1922 | } | |
1923 | ||
1924 | result = -NFS4ERR_NXIO; | |
1925 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
1926 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
1927 | __func__); | |
1928 | goto out; | |
1929 | } | |
1930 | ||
1931 | nfs4_begin_drain_session(clp); | |
1932 | ||
1933 | status = nfs4_replace_transport(server, locations); | |
1934 | if (status != 0) { | |
1935 | dprintk("<-- %s: failed to replace transport: %d\n", | |
1936 | __func__, status); | |
1937 | goto out; | |
1938 | } | |
1939 | ||
1940 | result = 0; | |
1941 | dprintk("<-- %s: migration succeeded\n", __func__); | |
1942 | ||
1943 | out: | |
1944 | if (page != NULL) | |
1945 | __free_page(page); | |
1946 | kfree(locations); | |
1947 | if (result) { | |
1948 | pr_err("NFS: migration recovery failed (server %s)\n", | |
1949 | clp->cl_hostname); | |
1950 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
1951 | } | |
1952 | return result; | |
1953 | } | |
1954 | ||
1955 | /* | |
1956 | * Returns zero or a negative NFS4ERR status code. | |
1957 | */ | |
1958 | static int nfs4_handle_migration(struct nfs_client *clp) | |
1959 | { | |
1960 | const struct nfs4_state_maintenance_ops *ops = | |
1961 | clp->cl_mvops->state_renewal_ops; | |
1962 | struct nfs_server *server; | |
1963 | struct rpc_cred *cred; | |
1964 | ||
1965 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
1966 | clp->cl_hostname); | |
1967 | ||
1968 | spin_lock(&clp->cl_lock); | |
1969 | cred = ops->get_state_renewal_cred_locked(clp); | |
1970 | spin_unlock(&clp->cl_lock); | |
1971 | if (cred == NULL) | |
1972 | return -NFS4ERR_NOENT; | |
1973 | ||
1974 | clp->cl_mig_gen++; | |
1975 | restart: | |
1976 | rcu_read_lock(); | |
1977 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
1978 | int status; | |
1979 | ||
1980 | if (server->mig_gen == clp->cl_mig_gen) | |
1981 | continue; | |
1982 | server->mig_gen = clp->cl_mig_gen; | |
1983 | ||
1984 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
1985 | &server->mig_status)) | |
1986 | continue; | |
1987 | ||
1988 | rcu_read_unlock(); | |
1989 | status = nfs4_try_migration(server, cred); | |
1990 | if (status < 0) { | |
1991 | put_rpccred(cred); | |
1992 | return status; | |
1993 | } | |
1994 | goto restart; | |
1995 | } | |
1996 | rcu_read_unlock(); | |
1997 | put_rpccred(cred); | |
1998 | return 0; | |
1999 | } | |
2000 | ||
b7f7a66e CL |
2001 | /* |
2002 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2003 | * if it's moved to another server. Stop when the server no longer | |
2004 | * returns NFS4ERR_LEASE_MOVED. | |
2005 | */ | |
2006 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2007 | { | |
2008 | const struct nfs4_state_maintenance_ops *ops = | |
2009 | clp->cl_mvops->state_renewal_ops; | |
2010 | struct nfs_server *server; | |
2011 | struct rpc_cred *cred; | |
2012 | ||
2013 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2014 | clp->cl_hostname); | |
2015 | ||
2016 | spin_lock(&clp->cl_lock); | |
2017 | cred = ops->get_state_renewal_cred_locked(clp); | |
2018 | spin_unlock(&clp->cl_lock); | |
2019 | if (cred == NULL) | |
2020 | return -NFS4ERR_NOENT; | |
2021 | ||
2022 | clp->cl_mig_gen++; | |
2023 | restart: | |
2024 | rcu_read_lock(); | |
2025 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2026 | struct inode *inode; | |
2027 | int status; | |
2028 | ||
2029 | if (server->mig_gen == clp->cl_mig_gen) | |
2030 | continue; | |
2031 | server->mig_gen = clp->cl_mig_gen; | |
2032 | ||
2033 | rcu_read_unlock(); | |
2034 | ||
2b0143b5 | 2035 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2036 | status = nfs4_proc_fsid_present(inode, cred); |
2037 | if (status != -NFS4ERR_MOVED) | |
2038 | goto restart; /* wasn't this one */ | |
2039 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2040 | goto restart; /* there are more */ | |
2041 | goto out; | |
2042 | } | |
2043 | rcu_read_unlock(); | |
2044 | ||
2045 | out: | |
2046 | put_rpccred(cred); | |
2047 | return 0; | |
2048 | } | |
2049 | ||
05f4c350 CL |
2050 | /** |
2051 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2052 | * | |
2053 | * @clp: nfs_client under test | |
2054 | * @result: OUT: found nfs_client, or clp | |
2055 | * | |
2056 | * Returns zero or a negative errno. If zero is returned, | |
2057 | * an nfs_client pointer is planted in "result". | |
2058 | * | |
2059 | * Note: since we are invoked in process context, and | |
2060 | * not from inside the state manager, we cannot use | |
2061 | * nfs4_handle_reclaim_lease_error(). | |
2062 | */ | |
2063 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2064 | struct nfs_client **result) | |
2065 | { | |
2066 | const struct nfs4_state_recovery_ops *ops = | |
2067 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2068 | struct rpc_clnt *clnt; |
2069 | struct rpc_cred *cred; | |
4edaa308 | 2070 | int i, status; |
05f4c350 CL |
2071 | |
2072 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2073 | ||
05f4c350 | 2074 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2075 | i = 0; |
2076 | ||
2077 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2078 | again: |
ea33e6c3 | 2079 | status = -ENOENT; |
73d8bde5 | 2080 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2081 | if (cred == NULL) |
2082 | goto out_unlock; | |
2083 | ||
2084 | status = ops->detect_trunking(clp, result, cred); | |
2085 | put_rpccred(cred); | |
2086 | switch (status) { | |
2087 | case 0: | |
2088 | break; | |
05f4c350 | 2089 | case -ETIMEDOUT: |
150e7260 TM |
2090 | if (clnt->cl_softrtry) |
2091 | break; | |
2092 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2093 | case -EAGAIN: |
2094 | ssleep(1); | |
202c312d | 2095 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2096 | dprintk("NFS: %s after status %d, retrying\n", |
2097 | __func__, status); | |
2098 | goto again; | |
4edaa308 | 2099 | case -EACCES: |
d688f7b8 CL |
2100 | if (i++ == 0) { |
2101 | nfs4_root_machine_cred(clp); | |
2102 | goto again; | |
2103 | } | |
6d769f1e | 2104 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2105 | break; |
05f4c350 CL |
2106 | case -NFS4ERR_CLID_INUSE: |
2107 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2108 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2109 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2110 | status = -EPERM; | |
2111 | break; | |
2112 | } | |
79d852bf | 2113 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2114 | if (IS_ERR(clnt)) { |
2115 | status = PTR_ERR(clnt); | |
2116 | break; | |
2117 | } | |
b193d59a TM |
2118 | /* Note: this is safe because we haven't yet marked the |
2119 | * client as ready, so we are the only user of | |
2120 | * clp->cl_rpcclient | |
2121 | */ | |
2122 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2123 | rpc_shutdown_client(clnt); | |
2124 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2125 | goto again; |
2126 | ||
2127 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2128 | status = -EPROTONOSUPPORT; | |
2129 | break; | |
2130 | ||
2131 | case -EKEYEXPIRED: | |
05f4c350 CL |
2132 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2133 | * in nfs4_exchange_id */ | |
2134 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2135 | break; |
2136 | default: | |
2137 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2138 | __func__, status); | |
2139 | status = -EIO; | |
05f4c350 CL |
2140 | } |
2141 | ||
2142 | out_unlock: | |
2143 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2144 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2145 | return status; | |
2146 | } | |
2147 | ||
76db6d95 | 2148 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2149 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2150 | { |
444f72fe TM |
2151 | struct nfs_client *clp = session->clp; |
2152 | ||
9f594791 TM |
2153 | switch (err) { |
2154 | default: | |
2155 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2156 | break; | |
2157 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2158 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2159 | } | |
444f72fe | 2160 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 2161 | } |
cbdabc7f | 2162 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2163 | |
3f10a6af | 2164 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2165 | { |
2166 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2167 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2168 | nfs4_schedule_state_manager(clp); | |
2169 | } | |
2170 | ||
0f79fd6f TM |
2171 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2172 | { | |
2173 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2174 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2175 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2176 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2177 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2178 | __func__, clp->cl_hostname); | |
0400a6b0 | 2179 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2180 | } |
2181 | } | |
2182 | ||
2183 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2184 | { | |
2185 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2186 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2187 | dprintk("%s: server %s rebooted!\n", __func__, |
2188 | clp->cl_hostname); | |
0400a6b0 | 2189 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2190 | } |
2191 | } | |
2192 | ||
8b895ce6 | 2193 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2194 | { |
0f79fd6f | 2195 | nfs4_reset_all_state(clp); |
cc0a9843 | 2196 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2197 | } |
2198 | ||
8b895ce6 TM |
2199 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2200 | { | |
2201 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
2202 | nfs4_schedule_state_manager(clp); | |
2203 | ||
2204 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2205 | } | |
2206 | ||
0f79fd6f TM |
2207 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2208 | { | |
4099287f TM |
2209 | /* FIXME: For now, we destroy all layouts. */ |
2210 | pnfs_destroy_all_layouts(clp); | |
2211 | /* FIXME: For now, we test all delegations+open state+locks. */ | |
2212 | nfs41_handle_some_state_revoked(clp); | |
cc0a9843 TM |
2213 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2214 | clp->cl_hostname); | |
0f79fd6f TM |
2215 | } |
2216 | ||
a9e64442 | 2217 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2218 | { |
b1352905 TM |
2219 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2220 | nfs4_schedule_state_manager(clp); | |
2221 | ||
cc0a9843 TM |
2222 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2223 | clp->cl_hostname); | |
0f79fd6f TM |
2224 | } |
2225 | ||
a9e64442 WAA |
2226 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2227 | { | |
2228 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2229 | &clp->cl_state) == 0) | |
2230 | nfs4_schedule_state_manager(clp); | |
2231 | } | |
2232 | ||
0629e370 AB |
2233 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
2234 | { | |
2235 | if (!flags) | |
2236 | return; | |
2c820d9a CL |
2237 | |
2238 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2239 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
2240 | ||
111d489f | 2241 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2242 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2243 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2244 | nfs41_handle_all_state_revoked(clp); | |
2245 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2246 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2247 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2248 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2249 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2250 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2251 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
2252 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2253 | nfs41_handle_backchannel_fault(clp); | |
2254 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2255 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2256 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2257 | } |
2258 | ||
c3fad1b1 AA |
2259 | static int nfs4_reset_session(struct nfs_client *clp) |
2260 | { | |
848f5bda | 2261 | struct rpc_cred *cred; |
c3fad1b1 AA |
2262 | int status; |
2263 | ||
1a47e7a6 TM |
2264 | if (!nfs4_has_session(clp)) |
2265 | return 0; | |
38045412 | 2266 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2267 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2268 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2269 | switch (status) { |
2270 | case 0: | |
2271 | case -NFS4ERR_BADSESSION: | |
2272 | case -NFS4ERR_DEADSESSION: | |
2273 | break; | |
2274 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2275 | case -NFS4ERR_DELAY: | |
2276 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2277 | status = 0; | |
2278 | ssleep(1); | |
2279 | goto out; | |
2280 | default: | |
f455848a | 2281 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2282 | goto out; |
2283 | } | |
2284 | ||
2285 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2286 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2287 | if (status) { |
cc0a9843 TM |
2288 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2289 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2290 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2291 | goto out; |
2292 | } | |
bda197f5 | 2293 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2294 | dprintk("%s: session reset was successful for server %s!\n", |
2295 | __func__, clp->cl_hostname); | |
41f54a55 | 2296 | out: |
848f5bda TM |
2297 | if (cred) |
2298 | put_rpccred(cred); | |
c3fad1b1 AA |
2299 | return status; |
2300 | } | |
76db6d95 | 2301 | |
a9e64442 WAA |
2302 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2303 | { | |
2cf047c9 TM |
2304 | struct rpc_cred *cred; |
2305 | int ret; | |
2306 | ||
1a47e7a6 TM |
2307 | if (!nfs4_has_session(clp)) |
2308 | return 0; | |
43ac544c | 2309 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2310 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2311 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2312 | if (cred) | |
2313 | put_rpccred(cred); | |
43ac544c | 2314 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2315 | switch (ret) { |
2316 | case 0: | |
cc0a9843 TM |
2317 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2318 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2319 | break; |
2320 | case -NFS4ERR_DELAY: | |
2321 | ssleep(1); | |
2322 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2323 | break; | |
2324 | default: | |
2325 | return nfs4_recovery_handle_error(clp, ret); | |
2326 | } | |
2327 | return 0; | |
a9e64442 | 2328 | } |
76db6d95 | 2329 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2330 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2331 | |
2332 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2333 | { | |
2334 | return 0; | |
2335 | } | |
76db6d95 AA |
2336 | #endif /* CONFIG_NFS_V4_1 */ |
2337 | ||
e005e804 | 2338 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2339 | { |
02860014 | 2340 | int status = 0; |
8ed27d4f | 2341 | const char *section = "", *section_sep = ""; |
02860014 | 2342 | |
02860014 | 2343 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2344 | do { |
2c820d9a | 2345 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2346 | section = "purge state"; |
b42353ff | 2347 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2348 | if (status < 0) |
2349 | goto out_error; | |
b42353ff | 2350 | continue; |
2c820d9a CL |
2351 | } |
2352 | ||
b42353ff | 2353 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2354 | section = "lease expired"; |
b79a4a1b TM |
2355 | /* We're going to have to re-establish a clientid */ |
2356 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2357 | if (status < 0) |
b79a4a1b | 2358 | goto out_error; |
b42353ff | 2359 | continue; |
e598d843 TM |
2360 | } |
2361 | ||
c3fad1b1 | 2362 | /* Initialize or reset the session */ |
1a47e7a6 | 2363 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2364 | section = "reset session"; |
4d643d1d | 2365 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2366 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2367 | continue; | |
2368 | if (status < 0) | |
76db6d95 | 2369 | goto out_error; |
76db6d95 | 2370 | } |
b6d408ba | 2371 | |
a9e64442 WAA |
2372 | /* Send BIND_CONN_TO_SESSION */ |
2373 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2374 | &clp->cl_state)) { |
8ed27d4f | 2375 | section = "bind conn to session"; |
a9e64442 WAA |
2376 | status = nfs4_bind_conn_to_session(clp); |
2377 | if (status < 0) | |
2378 | goto out_error; | |
bf674c82 | 2379 | continue; |
a9e64442 WAA |
2380 | } |
2381 | ||
5df904ae TM |
2382 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2383 | section = "check lease"; | |
2384 | status = nfs4_check_lease(clp); | |
2385 | if (status < 0) | |
2386 | goto out_error; | |
8faaa6d5 | 2387 | continue; |
c9fdeb28 CL |
2388 | } |
2389 | ||
2390 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2391 | section = "migration"; | |
2392 | status = nfs4_handle_migration(clp); | |
2393 | if (status < 0) | |
2394 | goto out_error; | |
5df904ae TM |
2395 | } |
2396 | ||
b7f7a66e CL |
2397 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2398 | section = "lease moved"; | |
2399 | status = nfs4_handle_lease_moved(clp); | |
2400 | if (status < 0) | |
2401 | goto out_error; | |
2402 | } | |
2403 | ||
b79a4a1b | 2404 | /* First recover reboot state... */ |
e345e88a | 2405 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2406 | section = "reclaim reboot"; |
591d71cb | 2407 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2408 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2409 | if (status == -EAGAIN) |
b6d408ba TM |
2410 | continue; |
2411 | if (status < 0) | |
2412 | goto out_error; | |
df817ba3 | 2413 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2414 | } |
2415 | ||
b79a4a1b TM |
2416 | /* Now recover expired state... */ |
2417 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2418 | section = "reclaim nograce"; |
591d71cb | 2419 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2420 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2421 | if (status == -EAGAIN) |
b6d408ba TM |
2422 | continue; |
2423 | if (status < 0) | |
b79a4a1b | 2424 | goto out_error; |
1da177e4 | 2425 | } |
707fb4b3 | 2426 | |
5601a00d | 2427 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2428 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2429 | nfs_client_return_marked_delegations(clp); | |
2430 | continue; | |
2431 | } | |
e005e804 TM |
2432 | |
2433 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2434 | /* Did we race with an attempt to give us more work? */ |
2435 | if (clp->cl_state == 0) | |
2436 | break; | |
2437 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2438 | break; | |
47c2199b | 2439 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2440 | return; |
1da177e4 | 2441 | out_error: |
8ed27d4f WAA |
2442 | if (strlen(section)) |
2443 | section_sep = ": "; | |
2444 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2445 | " with error %d\n", section_sep, section, | |
2446 | clp->cl_hostname, -status); | |
ffe5a830 | 2447 | ssleep(1); |
5601a00d | 2448 | nfs4_end_drain_session(clp); |
e005e804 TM |
2449 | nfs4_clear_state_manager_bit(clp); |
2450 | } | |
2451 | ||
2452 | static int nfs4_run_state_manager(void *ptr) | |
2453 | { | |
2454 | struct nfs_client *clp = ptr; | |
2455 | ||
2456 | allow_signal(SIGKILL); | |
2457 | nfs4_state_manager(clp); | |
2458 | nfs_put_client(clp); | |
2459 | module_put_and_exit(0); | |
2460 | return 0; | |
1da177e4 LT |
2461 | } |
2462 | ||
2463 | /* | |
2464 | * Local variables: | |
2465 | * c-basic-offset: 8 | |
2466 | * End: | |
2467 | */ |